anna university coimbatore affiliated institutions curriculum 2008

ME 2203 KINEMATICS OF MACHINERY 3 1 0 4
OBJECTIVE
To understand the concept of machines, mechanisms and related terminologies.
To analyse a mechanism for displacement, velocity and acceleration at any point
in a moving link
To understand the theory of gears, gear trains and cams
To understand the role of friction in drives and brakes.
UNIT I BASICS OF MECHANISMS 7(L)
Definitions – Link, Kinematic pair, Kinematic chain, Mechanism, and Machine. -Degree
of Freedom – Mobility - Kutzbach criterion (Gruebler’s equation) -Grashoff's law-
Kinematic Inversions of four-bar chain and slider crank chain - Mechanical Advantage-
Transmission angle.
Description of common Mechanisms - Offset slider mechanism as quick return
mechanisms, Pantograph, Straight line generators (Peaucellier and Watt mechanisms),
Steering gear for automobile, Hooke’s joint, Toggle mechanism, Ratchets and
escapements - Indexing Mechanisms.
UNIT II KINEMATIC ANALYSIS 10(L)+5(T)
Analysis of simple mechanisms (Single slider crank mechanism and four bar
mechanism) - Graphical Methods for displacement, velocity and acceleration; Shaping
machine mechanism - Coincident points – Coriolis acceleration - Analytical method of
analysis of slider crank mechanism and four bar mechanism. Approximate analytical
expression for displacement, velocity and acceleration of piston of reciprocating engine
mechanism.
UNIT III KINEMATICS OF CAMS 8(L)+3(T)
Classifications - Displacement diagrams - Parabolic, Simple harmonic and Cycloidal
motions – Graphical construction of displacement diagrams and layout of plate cam
profiles - circular arc and tangent cams - Pressure angle and undercutting.
UNIT IV GEARS 10(L)+4(T)
Classification of gears – Gear tooth terminology - Fundamental Law of toothed gearing
and involute gearing – Length of path of contact and contact ratio - Interference and
undercutting - Gear trains – Simple, compound and Epicyclic gear trains - Differentials.
UNIT V FRICTION 10(L)+3(T)
Dry friction – Friction in screw jack – Pivot and collar friction - Plate clutches - Belt and
rope drives - Block brakes, band brakes.
Total Number of Periods: L= 45 T= 15 60
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